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/*
* Copyright © 2012 Intel Corporation
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*
* Authors:
* Eugeni Dodonov <eugeni.dodonov@intel.com>
*
*/
extern "C" {
#include <sys/resource.h>
#include <sys/time.h>
#include <stdlib.h>
#include <unistd.h>
#include <err.h>
#include <pciaccess.h>
#include "intel_stats.h"
void *mmio;
static pthread_t m_thread;
static pthread_mutex_t m_lock;
static Stats counter1, counter2;
static inline uint32_t
INREG(uint32_t reg)
{
return *(volatile uint32_t *)((volatile char *)mmio + reg);
}
void
intel_get_mmio(struct pci_device *pci_dev)
{
uint32_t devid;
int mmio_bar;
int err;
devid = pci_dev->device_id;
if (IS_GEN2(devid))
mmio_bar = 1;
else
mmio_bar = 0;
err = pci_device_map_range (pci_dev,
pci_dev->regions[mmio_bar].base_addr,
pci_dev->regions[mmio_bar].size,
PCI_DEV_MAP_FLAG_WRITABLE,
&mmio);
if (err != 0) {
fprintf(stderr, "Couldn't map MMIO region: %s\n",
strerror(err));
exit(1);
}
}
struct pci_device *
intel_get_pci_device(void)
{
struct pci_device *pci_dev;
int err;
err = pci_system_init();
if (err != 0) {
fprintf(stderr, "Couldn't initialize PCI system: %s\n",
strerror(err));
exit(1);
}
/* Grab the graphics card */
pci_dev = pci_device_find_by_slot(0, 0, 2, 0);
if (pci_dev == NULL)
errx(1, "Couldn't find graphics card");
err = pci_device_probe(pci_dev);
if (err != 0) {
fprintf(stderr, "Couldn't probe graphics card: %s\n",
strerror(err));
exit(1);
}
if (pci_dev->vendor_id != 0x8086)
errx(1, "Graphics card is non-intel");
return pci_dev;
}
void m_init() {
intel_get_mmio(intel_get_pci_device());
pthread_mutex_init(&m_lock, NULL);
pthread_mutex_lock(&m_lock);
/* Initialize starting values */
pthread_mutex_unlock(&m_lock);
/* Run GPU monitoring thread */
pthread_create(&m_thread, 0, m_monitor, NULL);
}
void m_reset() {
struct rusage r;
/* Reset counter1 to counter2 values */
pthread_mutex_lock(&m_lock);
getrusage(RUSAGE_SELF, &r);
counter2.user = r.ru_utime;
counter2.system = r.ru_stime;
gettimeofday(&counter2.time, NULL);
counter1.user = counter2.user;
counter1.system = counter2.system;
counter1.gpu = counter2.gpu;
counter1.gpuidle = counter2.gpuidle;
counter1.time = counter2.time;
pthread_mutex_unlock(&m_lock);
}
Stats m_count() {
Stats stats;
struct rusage r;
pthread_mutex_lock(&m_lock);
getrusage(RUSAGE_SELF, &r);
gettimeofday(&counter2.time, NULL);
counter2.user = r.ru_utime;
counter2.system = r.ru_stime;
/* Do the calculations */
timersub(&counter2.time, &counter1.time, &stats.time);
timersub(&counter2.user, &counter1.user, &stats.user);
timersub(&counter2.system, &counter1.system, &stats.system);
stats.gpu = counter2.gpu - counter1.gpu;
stats.gpuidle = counter2.gpuidle - counter1.gpuidle;
pthread_mutex_unlock(&m_lock);
return stats;
}
void *m_monitor( void *data) {
while(1) {
uint32_t ring_head, ring_tail;
/* GPU usage */
ring_head = INREG(LP_RING + RING_HEAD) & HEAD_ADDR;
ring_tail = INREG(LP_RING + RING_TAIL) & TAIL_ADDR;
pthread_mutex_lock(&m_lock);
/* GPU stats */
if (ring_tail == ring_head)
counter2.gpuidle++;
counter2.gpu++;
pthread_mutex_unlock(&m_lock);
usleep(1000000 / SAMPLES_PER_SEC);
}
return NULL;
}
}
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